The buildings were divided into production-scientific and defensive ones, and the units were divided into infantry and armored vehicles. Units and buildings have not changed much since the time of the first part, however, some vehicles were renamed, for example, the Mammoth tank was called Apocalypse. The Soviet Union and the Alliance are at the center of the conflict. The story of Red Alert 2 directly continues the story of the Allies from the previous game. This world is based on the laws created by Albert Einstein. Command & Conquer: Red Alert 2 - a real-time strategy game that takes place in a parallel world of the 1970s-1980s.